package com.lagou.controller;

import com.lagou.domain.Course;
import com.lagou.domain.CourseVO;
import com.lagou.domain.ResponseResult;
import com.lagou.service.CourseService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/course")
public class CourseController {

    @Autowired
    private CourseService courseService;

    @RequestMapping("/findCourseByCondition")
    public ResponseResult findCourseByCondition(@RequestBody CourseVO courseVO) {

        List<Course> courseList = courseService.findByCondition (courseVO);

        ResponseResult result = new ResponseResult (true, 200, "响应成功", courseList);

        return result;
    }

    /*
    * 课程图片上传
    * */
    @RequestMapping("/courseUpload")
    public ResponseResult fileUpload(@RequestParam("file")MultipartFile file, HttpServletRequest request) throws IOException {

        //1.判断文件是否为空
        if (file.isEmpty ()) {
            throw new RuntimeException ();
        }
        //2.获取项目部署路径
        String realPath = request.getServletContext ().getRealPath ("/");
        String substring = realPath.substring (0, realPath.indexOf ("ssm_web"));

        //3.获取原文件名
        String originalFilename = file.getOriginalFilename ();

        //4.生成新文件名
        String newFileName = System.currentTimeMillis () + originalFilename.substring (originalFilename.lastIndexOf ("."));

        //5.文件上传
        String uploadPath = substring + "upload\\";
        File filePath = new File(uploadPath, newFileName);


        //如果目录不存在就创建目录
        if (!filePath.getParentFile ().exists ()){
            filePath.getParentFile ().mkdirs ();
            System.out.println ("创建目录" + filePath);
        }

        //图片就进行了真正的上传
        file.transferTo (filePath);

        //6.将文件名和文件路径返回，进行响应
        Map<String,String> map = new HashMap<> ();
        map.put ("fileName",newFileName);
        map.put("filePath","http://localhost:8080/upload" + newFileName);
        ResponseResult result = new ResponseResult (true, 200, "响应成功", map);
        return result;
    }

    /*新增课程信息和讲师信息的方法
    * 新增课程信息和修改课程信息要写在同一个方法中
    *
    * */
    @RequestMapping("/saveOrUpdateCourse")
    public ResponseResult saveOrUpdateCourse(@RequestBody CourseVO courseVO) throws InvocationTargetException, IllegalAccessException {

        if (courseVO.getId () == null) {
            //调用service
            courseService.saveCourseOrTeacher (courseVO);
            ResponseResult result = new ResponseResult (true, 200, "新增成功", null);
            return result;
        } else {
            courseService.updateCourseOrTeacher (courseVO);
            ResponseResult result = new ResponseResult (true, 200, "修改成功", null);
            return result;
        }

    }

    /*根据id查询具体的课程信息和讲师信息*/
    @RequestMapping("/findCourseById")
    public ResponseResult findCourseById(Integer id) {
        CourseVO courseById = courseService.findCourseById (id);

        ResponseResult result = new ResponseResult (true, 200, "响应成功", courseById);

        return result;
    }

    /*课程状态改变*/
    @RequestMapping("/updateCourseStatus")
    public ResponseResult updateCourseStatus(Integer id,Integer status) {

        //调用status，传递参数，完成课程状态的变更
        courseService.updateCourseStatus (id,status);

        //响应数据
        Map<String,Object> map = new HashMap<> ();
        map.put ("status",status);

        ResponseResult result = new ResponseResult (true, 200, "修改成功", map);

        return result;

    }
}
